Spin Balance

Is anyone out there doing this yet? Got off the horn with a driveshaft guy I know and he wants to do my setup to see how far out it is. As I`ve read in other posts the engine aligment isn`t true. Just installed my motor mount today by myself. Is the shim angled (taperred?) If so mine is now way off I`m sure. I`ve aligned motors in vessels and ships. But how in the hell can you possibly do run out on this thing. My arms barely fit through the hole/engine? And how would I with the pump? There is nothing to shim or move withthe glasswork. I`m stumped.